Simmons is portrayed as a stereotypical nerd as he enjoys working, thinks logically, and tells jokes that only he seems to find amusing. Simmons is also a very considerate person, as he has been shown to be very compassionate and kind to other characters. In addition, Simmons has expressed enjoyment in physical combat, as he was ecstatic when the Reds attacked the Blues. He also enjoys cleanliness and order as he believes it makes things more efficient and peaceful. 